Core-making machine



Feb. 2 1926.

K. E. WAHLGREN; ET AL CRE MAKING CHINE 4 Sheets-Sheet 1 Filed July 24. 1924 y Feb; 2 ,1926. 1,571,442

l ,K. E. WAHLGREN ET AL CORE MAKING IACHINE Filed July *24; 1924 4 4 sheets-sheet 2 Feb. 2 1926.

K. E. WAHLGREN er m..- y

GORE MAKING IIAGHINE Filed July 24. 1924 4 Sheets-She 5 L Feb. 2 i926.

l K. E. WAHLGRENET AL GORE MAKING MACHINE Filed July 24, 1924 yf!!! an.

Illlll'lllu @5% me@ anmWRmRY- YPatented Feb. 2, 1926.

. UNITED STATES PATENT OFFICE.

KNUT E. WAHLGREN, OF VALLEY STREAM, AND REINHART W. PITTLAN, OF NEW YORK, N. Y. ;v SAID PITTMAN ASSIGNOR T0 SAID WAHLGBEN.,

conn-MAKING MACHINE.

Application led July 24, 1924. l Serial No. 727,881.

To all lwhom t may concern:

Be it known that we, KNUT E. WAHLGREN, a citizen ofthe United States, and a resident of Valley Stream, county of Nassau and State of New York, and REINHART W. lrr'n MAN, a citizen of the United States', and a residentV owNewrYork city, county, and State of New York, have invented certain new and useful Improvements in Core.u

Making Machines, of which the following is a specification.

Thisinvention embodies an a paratus, and a method ofl roducing cores or foundry work, especial y the class of cores where duplicate work is required in large numbers, such as castings for plumbers fittin valves, engine cylinders, and the like. n apparatus made in accordance with the prescnt invention includes ,means for han ling the core boxes in which the cores are molded, that is to say, open the molds, close them, and swing them into the various positions required in one cycle of operation, during which time in the cycle of completing a fully formed score, certain other operatlons are performed by the operator of the machine, such as placin the sand in the two part mold, the intro uction of a wire into Y VVone suchmold part, the formingo,aY .yent

groove in themother?the/application of a paste to the surface of the partly formed cores, the joining of the twopartly formed cores, the removall of one mold member tov leave the fully formed cores in theV other mold member, transferring means for en-V gaging the fully formed cores, whichmeans also engages the'mold member in which the -cores are last stationed, and yturning completely over with the mold member, at which time the fully formed cores are on the top of the transferring member. The latter mold member is now returned to its normal position. The transferring member may now .be removed from the' mold member and together with the fully formed cores therein, put into the drying oven. i

An apparatus made in accordancewith the present invention includes driving mechanism controlled `by a cam disc said cam disc being turned step by step bythe operator of the machine, as the manual labor 1 proceeds inthe cycle of operations 1n the making of a complete core or lurality of cores, the'cam' dlsc operates s ifter" arms thatco-act with clutclr pulleys. Four auch start and stop the motor in any part of the Y cycle of o eration, the moving of the cam disc contro ling all o erations.

One object of the mvention is to provide an apparatus in connection with the method of producing cores that is simple and reliable in its action and capable of turning out a high class product and an increase in production. A further object is the handling of the mold members mechanically, since the `turning-of them by hand as is usuallyD done,is laborious `work, by our improved means female vhelp and unskilled labor may produce high class core Work.

, In the drawing showing embodiments of our invention, y ,n Ylligllie Lisa Vfront elevation of the machine showing the mold members in the closed position.

'Fig 2 is a side elevation showingy the upper part of the machine.

ig. 3 is a planJ view of the same.

Fig. 4 shows the two molds in o en position to receive the sand in the mo d cavities.

Fig.' 5 shows the swinging frame forr the vent core plate.'

Olg. 6 shows the core sections supporting r j Figs. 7 to 11 are views similar to Fig. 4 .in diierent positions of the parts shown.

Fig. 12 showsthe open lframe for the zcores.

Fig. 13 shows the oven for baking the cores. A

Fig.. 14 shows the core complete.

Fig. 15 shows means for applying Ithe Paste v Fig. 16 shows enlarged the clutch device- Fig. 17 shows the core boxes.

Fig. 18 shows inverted view 4of paste ap- Vfpling means.

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As set forth the machine comprises a frame having standards 2 and 3, in which, is

journaled a main shaft 4, which 'carries a support 5 for the moldbox 6 fast thereto,

whereby the shaft will swing the mold when turned.' This shaft has loose thereon, a

parts, the portion in the fo'rm of an angle plate to whichgthe molds arebolted beingf slidable 4on the outer parts 12, that are .mounted on 'shaft 4, and sleeve 7 respectively, and are adjustable thereon by means of a lever 13 pivoted on the part 12, that carries a. pin 14 working in a cam slot 15 on gether.

art 10 see Fi 3. By these supporting iiieans ither cfg the molds can be. shifted` from horizontal position shown in Fig.4 where they lie in the same horizontal plane, tov that of Fig. 7 where the molds are engaged on`- the core face. 1-

yThe shaft 4, andthe sleeve frame 7 are actuated by any suitable controlling means, that will move them independently or to- By swinging the shaft and the sleeve, the molds can be brought from the position of Fig. 4 to that of Fig. 7 in which their core faces are brought together on a vertical plane, and the core sections will register. The two molds can now be. swung from this position to that of Fig. 8, in which these faces are in a horizontal plane. They 4the position of Fig. 10,' and then to thatI of Fig. n

Fig. 17 and-in the otherviews, `the molds 6 and 8 jare shown provided with depressions 16, all of the same form,` so that when the two mold facesare brought toether as in Fig. 7, the depressions will reglster, each .being a complementary half of the core. Wheninthe open position, these depressions are filled with sand as usual, and generally a vent channel for air is provided in onef of the meeting faces. .Sometimes a wire Yframe 17'is'inserted in one ofthe two sections of the core s,as indicated in'Fig. 6. On one of themold boxes asfS a 'vent frame 18 is brought tofbear, being hinged 'at`.19 to swing-down on the mold yfaces and cause oovesb 20 therein by ribs 21 on the late 8;''see Fig. 5. en the two molds ave been thus prepared, they are treated with a coating of paste by a block 22. The su ports are now. .swung to theuposition of Fig. ,that will bring the mold faces to ther to engage the core sections, that will ere because of the paste.theron. `-Thetwo molds arejthen -swung in Athis fixedA relative. positionl to vthe horizontalpsition off-Fig. 8, and then .the

`\ :ams are so arran A' 'c'.lutchsarel engage -to swing the shaft 4 and' mold 6, is moved upwardly by the lever 13, as indicated in broken lines in Fig. 8, since the two core sections will be now united b v paste as indicated in Fig. 14. Then the mold 6 is swung back to the former horizontal position as shown `in Fig, 4, but since it was shifted on the frame it will now take a lower Aposition as indicated in Fig. 9. The next "operation is to lace the frame 63, see Fig. 12, on the mold 8,'that will engage cores thereon, lwhich frame may have suitable locking means on the corners. The mold 8 is now swung back on to the mold 6, as

shown in Fig. 10, sot'hat the carrier frame` 63 will rest on 4the mold 6, and the cores 25 l The moldwill rest on top of the carrier. 8 is now swung over, as indicated in Fig'. 11, and the cores will remain on to of the frame 63. This frame is now simp y lifted off of the mold 6, and the cores resting thereon are placed with this frame in the oven 27, as lindicated in Fig. 13.

The shaft 4 and the sleeve frame 7, are provided with gear segments 28 and 29 respectiv'ely, that engage pinions 30 and 31 on shafts 32 and 33, as shown in F in'. 19. Each of these shafts is rotatablein bearingsfon frame 2 in a supporting block 34, and the pinions are always in mesh with their segments. I loosely mounted belt pulleys 35' and 36 driven in opposite directions fromany suitable motor, and' each pulley carries clutch levers 37, which engage a sleeve 38, slidable on shaft 33, but held from turning thereon by a key 39, between the shaft and sleeve. When this sleeve is moved toward one pulley, its tapered. end will swing levers 37 againstdiscs 40 and 41' on the pulley, that will now drive the shaft 32 in one direction;

On the shaft 32. see Fig. 16, are

and one of said discsmay be of friction rangement of two pulleys 43 and 44 with,y

clutch members are controlled by sleeve 45 similar to sleeve 38.v Asshown in Fig. 19,

these clutch sleeves are controlled by rocker arms, the sleeve 38 being engaged by arm 46 fast on shaft 47 while a shaft 48 has 'a r'ork arm 49 engaging sleeve 45. On one Iend of shaft "47, is an arm 50 with a pin 51,.` that is enged by suitable cams onfa cam wheel t er-'cams on this wheel env age a pin theV sleeve frame 7, to'cause swinging of the mold boxes 6 and 8 to the positions described 'with reference to Fi 4-11 inclusive. The friction clutch will. s 'p when the molds are brought together, and a 'stop en'glgu the 'two mold frames when brought 4to the horiother materialmwhich will have substantiallv outlined the core sections in the molds, and will serve for applying paste on the'faccs of the section beyond the vent groove, sov

Vthat the paste will not enter the groove that might interfere by stoppage.- The plate 22 can have the ribs moved across a rolle-r 61 in a paste box 62 to coat the face of theribs.

ln Fig. 12, is shown a transfer frame 64 comprising an outside frame 63 with cross plates 6,5 suitably shaped to receive the core 25. At the corners are projections 66 for attachment to the core box 6. Also retaining means in the form-of spring clips 67 preferably located at two diagonally opposite corners to engage sockets 68 of the mold boxes, see Fig. 17.

To guard against separation of the two mold boxes as they travel together, from the Fig. 7 position to that of Fig. 8 a lock member may be employed comprising a pin and hook as indicated at 69 in Fig. 1.

lln the operation of the device the molds 6 andS are in the positions indicated in Fig. 4, and sand is placed in the cavities as usual and the supporting rod may bealso placed in one section. rlihe plate 18 is then brought down and its ribs v21 will form the vent channel 30 in one section. The control wheel' 52 isthen turned whose cams will connect the clutches one on each shaft to turn the shafts in opposite directions and swing the molds up to position, Fig. 7. But previous to this operation the paste brush 22 is moved over the roller 61, and then applied to one section as indicated in Fig. 4 and removed. When the molds are thus swung up together the two sections will adhere and will form a complete core 25 asl indicated in Fig. 1.4. Hand wheel is further advanced and suitable cams thereon will advance the molds to position of Fig. 8 which can be done by simply advancing frame 5 in the saine direction that will Swing frame 7 with it. A stop member 60, will arrest the molds and their frames in this,

position, and will also serve to hold the molds, or either of them in the open position of Fig. 4, and in other positions. The

mold 6 must now be separated from the mold 8,lwhich is doneby swinging lever '13 for this moldthat will move the moldupwardl on its frame 5 as indicated by broken lines in Fig. 8. The frame 6 is now swung back to y,the former positionl to en-` gage'the stop 60, it will be seen that its face lies below the level'of mold 8 on the opl posite side because of, the shifting by lever 13. The carrier lv--frame 63 isv now placed on the mold 8` asindcated in Fig. 9, and will be locked thereon, and engage each core. The next operation is to move the control whose cam will engage one clutch to swing the frame 7, back on top of the mold 6, as shown in Fig. 10. -The frame 63 will be carried with it and will now lie beneath the mold 8 and rest on the mold 6, the attachments of mold 6 reversing their supporting by the thickness of the carrier. This lattcr shift will reverse the carrier and bring the cores to rest on top of the carrier as shown in Fig. 10. The last operation of the machine is to cause the mold 8 to be swung over to the opposite side as shown in Fig.

11, that will permit the removal of the carrier frame with the cores thereon, to be placed in the oven 27. It is onlynecessary to now return the mold 6 to its former position as shown in Fig. 4, in level with mold 8, which is done bylever 13.

A jarring device may be employed to insure proper separation of the mold boxes 6 and 8, and has one form as shown in these Flgs. l and 8, comprising a hammer 70 having an arm 7l, ressed by spring 72 against a notched dise 3. This disclis carried by pulley 74 on a swinging frame 75 with lever 76 that will bring this pulley against one of the belts 77 for the main pulleys.

What we claim is ,1. In a eore forming machine, a main frame, a pair ofmold supports each movably mounted on the frame, whereby the molds can be swung independently to bring the faces to ether, and whereby the engaged'v molds can swung together in fixed relatlve position, a driving member, and an automatic control member connecting the driving member with the mold supports and shiftable to a number of diHerent positions,l

'core faces horizontal and one mold inverted,

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and then cause the inverted mold to bey shifted back to its normal horizontal position, said operations being effected in said sequence by successive advanceanovements of the control member.

2. lln a core vforming machine, a main frame, a pair of mold supports each movably mounted on the frame, whereby vthe molds can be swung independently to bring the faces together, and whereby the en aged molds canbe swung-together in fixe relatlve position, each mold being` shiftable on" its support in a direction perpendicular to its core face, a driving member and an automatic control member connecting the drivingymember with themold supports and shiftable to' a number of .diiferent positions, whereby the control member will cause the limb molds w-be niet brought to apposite horizontal positions then'cause both the molds` to be swung to bring their faces together in a vertical plane, and'then cause the engaged molds to be shiftedpto a position with said core faces horizontal and one mold inverted, and then cause the inverted mold shifted back to its normal horizontal position, said operations being effected in said sequence by' successive advance movements of the control member.

3. tIn a -core forming machine, a mainframe having a supporting shaft journaled therein,l a mold support mounted on said shaft, asecond shaft'in the form of a sleeve surrounding said shaft, a mold support on the second shaft, whereby vthe supports can b e swung inde ndentlyin opposite directions to bring t e molds together with their faces engaged, and whereby the engaged molds can be swung together in fixed relaposition,u said operations being effected inl said sequence by successive movements of a control member arranged to connect the mold supports with said power device.

4. In a core `forming machine, a' main i frame having a supporting shaft journaled therein, a mold support on said shaft, a second shaft in the form of a sleeve surrounding said shaft, a mpld support on the second shaft, whereby the"`supports can be swung independently in opposite directions to brin the molds together with their faces engag and whereby the engaged molds can be swung together in fixed relative position, each mold being shiftable on its support in a direction perpendicular to its coreface, a driving member, and an automatic control member fortlie supports shiftable toanumber of different relative positions, whereby the control member will case molds to bje first brought to opposite horizontal positions, then cause both mol-ds" to be swung to bring their faces together in a vertical plane, and then cause the engaged molds to be shifted to a position with said core faceshorizontal and one mold inverted, and then cause the inverted mold to be shifted back to its normal horizontal position, said operations being effected in said sequence by successive movements of the control member arranged toyconnect the mold supports with" said power device.

' its core face.

5. In a .core forming* machine, a main frame' having a supporting shaft -journaled therein, a mold support mounted on said shaft, a second shaft in thel form of a sleeve' surrounding said shaft, a mold support on the second shaft, each mold being slidably mounted on its support, in opposite directions to bring the molds together with their molds can be swung together `infxed rela-` tive position, a control device comprising a pair of shafts driven in `opposite directions and each carrying a clutch member, a clutch e element shiftable to engage either of said clutch members to be thereby turned in opposite directions, saidelutch element being connected with said mold support shaft, a second driving member comprising a clutch element connected with. said sleeve, and a pair of clutch members driven in opposite` vfaces engaged, and wherebythe engaged directions arranged to be engaged alternately by said latter clutch element, a control member,and means connected the control member with said two shiftable clutch elements wherebyl advance of the member vwill cause the molds to be first brought to oppo-v tive position, one of sa'id molds being shiftable on its support in adirection perpendicular to its face, and a cam lever on the support to so shift the mold.

7. In a core forming machine, a I nain frame having a shaft joiirnaled therein, a

mold support mounted on said shaft, a secl ond shaft in the form` of a sleeve surrounding said shaft, a mold support on the second shaft, whereby the supports lcan be swung independently in opposite directions to bring' the molds together with' their faces engaged, and whereby the engaged molds can be swung together in fixed relative position,

each mold being independently shiftable on its support in a direction perpendicular to 8. In a core forming machine, a ymain frame having a supporting shaft journaled therein, a mold support mounted on said shaft, a second shaft inthe form of a sleeve surrounding said s haft, a mold support on the second shaft, whereby the supports. can be swun inde endently in opposite directions to ring the molds to ther with their faces engaged, and where y the engaged molds can be swung together in fixed relative position, each mold` being independently shittable on its support in a dlrection perpendicular to its core face,vand means for.

shifting the mold supports.

9. In a core forming machine, a main trarne having a supportingshaft journnled therein, a mold support mounted on said shaft, a second shaft in the form of a sleeve surrounding said shaft, a mold support on the second shaft, whereby the supports can be swungindependently in opposite directions to bring the molds together with their faces engaged,V and whereby the engaged molds can be swung together in fixed relative position, each mold being independently shiftable on its support in a direction perpendicular to its core face*` and means fon Y shifting the mold supnorts independently and also shifting the mold supports-in ixed relative position.

10. In a core forming machine, a main frame, a. mold support movably mounted on said frame, a second mold support movably mounted on the frame, whereby the molds supports can be swung` to bringi the mold Vfaces together, and whereby the engaged molds can be swung together in fixed relative positioneach mold being independently shiftable on its support in a direction perpendicular to its core face. A

Signed at New York city, N. Y., on July 17th,1924.

KNUT E. VVAHLGREN. REINHART W. PITTMAN. 

